Handling Emergency Bearer Service

Abstract

A method of handling an emergency bearer service for a mobile station in a wireless communication system is disclosed. The method comprises camping on a cell which provides a normal service or a limited service to the mobile station; and not sending an indicator to a network node when the mobile station attaches to a network for the emergency bearer service, wherein the indicator indicates the mobile station is a machine type communication (MTC) device or a low priority device.

1 . A method of handling an emergency bearer service for a mobile station in a wireless communication system, the method comprising:
 camping on a cell which provides a normal service or a limited service to the mobile station; and   not sending an indicator to a network node when the mobile station attaches to a network for the emergency bearer service, wherein the indicator indicates the mobile station is a machine type communication (MTC) device or a low priority device.   
     
     
         2 . The method of  claim 1 , wherein not sending the indicator to the network node comprises not sending the indicator to the network node in an attach request message. 
     
     
         3 . The method of  claim 1 , wherein the network node is a Service GPRS Supporting Node (SGSN). 
     
     
         4 . A method of handling a emergency bearer service for a mobile station in a wireless communication system, the method comprising:
 camping on a cell which provides a normal service or a limited service to the mobile station; and   setting an indicator in a message to zero and sending the message to a network node when the mobile station attaches to a network for the emergency bearer service, wherein the indicator indicates the mobile station is a machine type communication (MTC) device or a low priority device.   
     
     
         5 . The method of  claim 4 , wherein the network node is a Service GPRS Supporting Node (SGSN). 
     
     
         6 . A method of handling a emergency bearer service for a mobile station in a wireless communication system, the method comprising:
 camping on a cell which provides a normal service or a limited service to the mobile station; and   initiating an emergency attach procedure on the cell when the mobile station attaches to a network for the emergency bearer service.   
     
     
         7 . The method of  claim 6 , wherein initiating the emergency attach procedure comprises setting an attach type as Emergency Attach and sending the attach type in an attach request message. 
     
     
         8 . A method of handling an emergency bearer service for a mobile station in a wireless communication system, the method comprising:
 having a call; and   not releasing the call when the call is ongoing and a change of a device configuration occurs.   
     
     
         9 . The method of  claim 8 , wherein the change of the device configuration comprises the mobile station changes from a low priority device to a normal device. 
     
     
         10 . The method of  claim 8 , wherein the change of the device configuration comprises the mobile station changes from a machine type communication (MTC) device to a non-MTC device. 
     
     
         11 . The method of  claim 8  further comprising performing a detach procedure and subsequently an attach procedure when the call is finished. 
     
     
         12 . The method of  claim 8 , wherein the call is a packet switch (PS) call or a circuited switch (CS) call. 
     
     
         13 . A method of handling an emergency bearer service for a mobile station in a wireless communication system, the method comprising:
 having a call; and   not changing a device configuration of the mobile station when the call is ongoing.   
     
     
         14 . The method of  claim 13 , wherein not changing the device configuration comprises not changing a property of the mobile station from a low priority device to a normal device. 
     
     
         15 . The method of  claim 13 , wherein not changing the device configuration comprises not changing a property of the mobile station from a machine type communication (MTC) device to a non-MTC device. 
     
     
         16 . The method of  claim 13 , wherein the call is a packet switch (PS) call or a circuited switch (CS) call.